The corrosion fatigue crack initiation life is not affected independently by each stress rising time t//R and stress holding time t//H, but by the sum of the t//R and t//H, that is, by stress frequency, f equals 1/(2t//R plus t//H), On the other hand, the corrosion fatigue crack propagation life is influenced independently by t//R and t//H. The t//H characteristics show the transition behaviour from the cyclic dependent mechanism into the time dependent mechanism. The crack propagation life occupies major part of fracture life. The fracture life law diagram plotted by the fracture time t and fracture cycles N, as normalized stress corrosion life t(SCC), and corrosion fatigue life (cycles) N//C//F(t//H equals 0), respectively, shows approximately the same curve with respect to the parameter t//R.
|Number of pages||4|
|Journal||Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|Publication status||Published - 1985 May|
ASJC Scopus subject areas
- Mechanical Engineering